论文信息 - Behavioral Modeling of Switched Capacitor Integrators with Application to ΣΔ Modulators

Behavioral Modeling of Switched Capacitor Integrators with Application to ΣΔ Modulators

This paper presents two accurate behavioral models for switched-capacitor integrators with application to the modeling of low-power high-speed ΣΔ modulators. The first model is based on the integrator transient response and includes the effects of the amplifier transconductance, and output conductance. The second model is based on a symbolic node admittance matrix representation of the system. VHDL-AMS and MATLAB Simulink were used to implement the first and second model, respectively. Simulations for a GSM/WCDMA second-order multibit ΣΔ modulators model were performed, exhibiting less than 5.0% of error in the signal-to-noise plus distortion ratio (SNDR) when compared to experimental data.

M. Jimenez | G. Suarez | F.O. Fernandez

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